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</o:shapelayout></xml><![endif]--></head><body lang=EN-NZ link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Hi Hank / Alan,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>There are excess flow valves available for air/gas. We make them but also Swagelok have them. Ours are industrial for high gas flows.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>You need to make sure they are self resetting. Hugh<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Personal_Submersibles [mailto:personal_submersibles-bounces@psubs.org] <b>On Behalf Of </b>hank pronk via Personal_Submersibles<br><b>Sent:</b> Thursday, 3 November 2016 1:16 AM<br><b>To:</b> Personal Submersibles General Discussion<br><b>Subject:</b> Re: [PSUBS-MAILIST] Electronic contents gauge<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><div><div id="yui_3_16_0_ym19_1_1478088642436_9199"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Alan,<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1478088642436_9199"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>There is a hydraulic component on cranes etc the allows oil to flow at a set rate, but if the flow increases dramatically the component becomes a shut off valve. This is to protect people and equipment in case a hose or seal blows out. maybe there is aa air equivalent?<o:p></o:p></span></p></div><div id="yui_3_16_0_ym19_1_1478088642436_9199"><p class=MsoNormal style='background:white'><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'>Hank<o:p></o:p></span></p></div><div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-size:9.0pt;font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><div><div><div><p class=MsoNormal style='background:white'><span style='font-size:10.0pt;font-family:"Arial","sans-serif";color:black'>On Wednesday, November 2, 2016 3:43 AM, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> wrote:</span><span style='font-family:"Helvetica","sans-serif";color:black'><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div><div id=yiv8957119398><div><div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4220"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I just experimented with the flow from the high pressure port<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4182"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>on my 1st stage regulator. That's the one your pressure gauge runs off.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4181"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Even though the hole is literally a pin prick, I was getting at least<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4162"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>2 liters a second flow out of it. <o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4160"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I am building a similar sized sub to Cliff's R300 & a leak like that,<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4164"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>apart from increasing the pressure massively, would be hazardous<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4292"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>if it was O2. In 4 minutes I could have 70% O2 based on an air<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4294"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>volume in the sub of 250 liters.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4317"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I think I'll go for a pressure gauge outside my view port or try potting<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4346"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>a digital pressure gauge & just send the wires through a penetrator.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4353"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Alan<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4078"><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4158"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4157"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4156"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4215"><div id=yiv8957119398yqtfd67376><div class=MsoNormal align=center style='text-align:center;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><hr size=1 width="100%" align=center></span></div><p class=MsoNormal style='background:white'><b><span style='font-family:"Helvetica","sans-serif";color:black'>From:</span></b><span style='font-family:"Helvetica","sans-serif";color:black'> Alan via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>><br><b>To:</b> Personal Submersibles General Discussion <<a href="mailto:personal_submersibles@psubs.org">personal_submersibles@psubs.org</a>> <br><b>Sent:</b> Wednesday, November 2, 2016 12:41 AM<br><b>Subject:</b> Re: [PSUBS-MAILIST] Electronic contents gauge<o:p></o:p></span></p></div></div><div id=yiv8957119398yqtfd31492><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4155"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div id=yiv8957119398><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4212"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4213"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Thanks for the advice Steve.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4211"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I haven't looked in to the electronic oxygen add system too deeply.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Bound to have some questions later on.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4375"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Cheers Alan<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4376"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>Sent from my iPad<o:p></o:p></span></p></div><div id=yiv8957119398yqt51556><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4377"><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>On 1/11/2016, at 9:39 pm, Stephen Fordyce via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<o:p></o:p></span></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4381"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4380"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4379"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4378"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Thanks Alan - I should probably point out that my Watchdogs are rather literally named - ie. they can sense something is wrong and do something simple about it, but are limited in how complex the reaction can be. It can only handle one O2 input, and the control is limited by controller settings - it's an off-the-shelf item and not fully programmable like a PLC. Good for an independent backup or alarm. As a primary system it could be made to work but would require a thoughtful setup.<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4382"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4383"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Eventually I do plan to make a rebreather controller (for the rebreather I'm designing) which would be perfect (many O2 cell inputs and a solenoid or two output), but that's a while away!<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>A key thing to consider in automatic oxygen adding is placement of sensors, natural mixing of the air and sufficient time delay in the control system to get meaningful feedback before the next oxygen injection (Ie. rebreather controllers squirt a little bit of oxygen in, wait a few seconds for it to mix, and then measure, and squirt in more accordingly).<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4384"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4385"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Cheers,<o:p></o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4386"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Steve<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4387"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>PS: I also have some M12 plated brass Blue Globe cable glands if you find yourself short a couple - very hard to get down here.<o:p></o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div><div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4393"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4392"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>On Tue, Nov 1, 2016 at 2:19 PM, Alan James via Personal_Submersibles <<a href="mailto:personal_submersibles@psubs.org" target="_blank">personal_submersibles@psubs.org</a>> wrote:<br><br><o:p></o:p></span></p><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4390"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4389"><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3134"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>Steve,<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3183"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>sending this again as I didn't receive it...<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3186"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Steve,<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3188"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>I am wanting to build an O2 system like James Cameron had.<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3190"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>An O2 valve that flows continuously with a top up from a solenoid<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3192"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>valve which triggered by a plc that is receiving signals from 3 x O2 sensors. <o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3194"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Mainly because I want to keep everything as small as possible.<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3196"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'> With your O2 unit it looks like you could have it doing similar;<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3198"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>turn on a solenoid to top up the O2 beyond what is flowing in from<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3200"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>a pre-set valve. A bellows add system that replaces the bellows with<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3202"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>your "Oxygen Watchdog"<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3204"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Know what you mean about UK freight charges, have cancelled items<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3206"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>because of ridiculous freight charges. Thanks for the offer of buying<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yui_3_16_0_ym19_1_1477970226444_3208"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>through your firm.<o:p></o:p></span></p></div><div id="yiv8957119398m_-1904202565053152574yiv7750647722yui_3_16_0_ym19_1_1477958744792_5053"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>Cheers Alan<o:p></o:p></span></p></div></div></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><br>______________________________ _________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4394">Personal_Submersibles@psubs. org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/ listinfo.cgi/personal_ submersibles</a><o:p></o:p></span></p></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div></blockquote></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt' id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4398"><div id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4397"><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank" id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4395">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div></blockquote></div></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div id=yiv8957119398yqt31552><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org" target="_blank">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank" id="yiv8957119398yui_3_16_0_ym19_1_1478077967724_4399">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div></div></div></div></div></div></div><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p><div id=yqtfd47991><p class=MsoNormal style='background:white'><span style='font-family:"Helvetica","sans-serif";color:black'>_______________________________________________<br>Personal_Submersibles mailing list<br><a href="mailto:Personal_Submersibles@psubs.org">Personal_Submersibles@psubs.org</a><br><a href="http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles" target="_blank">http://www.psubs.org/mailman/listinfo.cgi/personal_submersibles</a><o:p></o:p></span></p></div><p class=MsoNormal style='margin-bottom:12.0pt;background:white'><span style='font-family:"Helvetica","sans-serif";color:black'><o:p> </o:p></span></p></div></div></div></div></div></div></body></html>